Pipe-coupling.



11. L. GRAVES. PIPE coupLme. I APPLIOATIOH FILED 00T. 3, 1908.

Patent-,ea May 9, 1911.

im ml/M -EIcHMoNn I.. GRAVES, or lMEMPHIS, TENNESSEE, AssIeNon E ONE-HALE 'rowIni um A. HnnnwIcH, or MEMPHIS, TENNESSEE.,

` .Here-construe.

To .all Iwhom "it may oncem; l

Be it known -that I, RICHMOND L GunivEs,`

a citizen of the United States,l residing at Memphis,in the county of Shelby and' State -of Tennessee, have invented a newand useful Pipe-Coupling, i 'is a speciicatlon.` y U 'This invention relates to pipe couplings; and has yfor its object to provide a strong and simple universalv coupling for steam, wlan. air, gas, and other` pipes,"` said cou-- P mg nected by uid tightpjolnts and held against 'disengagement through the mediumv ,0f 'a iirm'and easilyl appliedanti-fric'tion loclm l' g means. i',

With this and other-objects inview the invention consists of the/novel construction, combination and arrangement ofparts here `inafter described and claimed and illus'-` tratedin` the accompanying drawing' in Figure 1 1s a central-sectional view ofthe improved'pipe cou liugv and Fig.- 2,- across sectional view"on`` ne llne 2.- 2 of Fig.I Sinflar reference-'numerals are used for the samev parts in all the figures. Q

In the drawings, the numeral 1 indicates a 'tting having a neck 2: at lone end and a tapering plug 3 at its other end. Through' the fitting 1 a bore 4 is made, screw-threaded at the" neck end'for apipe.- A secondv neck 5 rojects from the iittingll atta yright. ,angle t creto andis rovidedfwitha"thread-A 'ed bore' 6 of like"v iameter j asth'ejl bore f4" and opening into the saine. pip'ef .7; may. be.I screwed into either-bore as circumstances require7 but in the drawing it is .represented as entering the right angle hore 6j.y The used bore 4 is `closed by a cap or -plug 8 which is also employed to close .the orel 6 f when the pipe is attachedto 'the neck` 2.

.The tapered plug 3f on the-tting '1'. is

ground snugly into a similarlyshaped' vseat 5,9in theenlarged end 9".-.of 'a right angle 4 "cou lingffinemberilO, the-opposite end 'there if geinig provided hwith. a taperedplug 11 in e the; luga... f-

'l d ri angle-coupling memberl12g' of which the following? expansion under increasin comprlslng few parts'. rotatablyfconr ocket. withinwhich the# A.plug'lll is adapted to turn, while thejvother end 14 is threaded fora pipe 15. The extreme end of each .plug 3 and 11 is .fitted with an expansible packing ring 16 made of xa metal or alloy having a greater ratio of temperature thanv the metal of which t e coupling .is made; On the couplingmemberl at thev base of the tapered plug 11 is an exterior iiange orc'olla'r 17v flat on the plugside 'to form av seat for the extremity largement 12EL .ofthe member 12.

"It Aism-ola, ngtedY that while the plugs a a and. ll'are ground lto .a close smooth fit with thelr respective sockets and made iluid tight the packingrings'l, the severalparts would quickly. separate lwere ino means provided to retain them'in'place... For this pur-l .pose,'therefore, a semiclrcular groove 18 is Specification of Letters Patient.' A} ],1je11f,e (1 jMay 9, 191.1( -Appucatibn med ummm-r v:z,...1so. `v serial No. 455,998,

cut veircumierentially'in each plug .3v and 11,', and in their sockets which grooves coincide whenfthe parts are assembledand form a `tubular channel.betweenthem. 'A lhole 19, visbol'jed in a radial 'direction through ,thef

socket 'end .of .each coupling member pas' 'far as the. channel 18 for the purpose of introvducing therethroughIA to -thechannel the 'means lfor preventing the withdrawal of the v tapered plug from its socket, as forA instance fil 'ng the groqves with, anti-friction balls 20, the holes v19fbeing'tap/ped for'screws 22 to prevent the escape of said balls... Xhat is claiilned ietf- 1 e:.cou 1n .com r1s1n 4three memetv tapered :extension providedl externally. at its extreme' end with a packing ring having a greater ratioofexpansion than the material x of `the couplingfan'd the other.v terminal memberbeing provided with a tapered bore., 1`

.an intermediate frnember having al tapered extension` provided externally at its vextreme end with .a packing vring havinga greater ratio of expansion than the material'of the coulling, the' other terminalof the inter-` `une iatel memberfha'ving. a tapered bore to l'engage theftapered' extension ojrf therst named member,' 'the intermediate ortionv of each extension and of each `bore eing) pro- 1 "vided vwith awcircumferential groove', the'two grooves beingffarranged Ito register;s Aand a A -iller disposed the grooves fo remy own; I have hereto axed mj signature Eenttseparatiorrcthe poils of the coup 1 inthe presence of t'wo'witnesses.

ut' 'o permit swi've` movementvre a- Vtive to each other, the disposition of the RICHMOND L y 'f5 Eaclging. being such as to secure a. l, Witnz v n u1d`t1 ht ]oint between the members. JAMES R; v testimony that I claim the foregoingas p H11-Nm? Semoun. 

